A BDS Hypersil C 5 lm column (250 mm 4.6 mm i.d.) and a similar pre-column (4 mm 4.6 mm i.d.) from Thermo (Bellefonte, USA) were used for the separation
A BDS Hypersil C 5 lm column (250 mm 4.6 mm i.d.) and a similar pre-column (4 mm 4.6 mm i.d.) from Thermo (Bellefonte, USA) were used for the separation